Nicolas Batum twice had to leave the Blazers' game against Sacramento because of back pain.Bruce Ely/The Oregonian

TUALATIN – The day after a 19-point home loss to Sacramento in which two of their key players couldn’t finish because of injuries, the Trail Blazers’ immediate future remained up in the air after they practiced Sunday.

Portland will likely have to play without one, possibly two, of its starters Monday when the Toronto Raptors come to the Rose Garden.

Forward Nicolas Batum (back) said he doubted he would be able to play against the Raptors, while guard Wesley Matthews (left hip) was feeling better but was still not sure if he would be able to play Monday.

Blazers coach Terry Stotts admitted the uncertainty is unsettling.

“When two of your top four scorers are out, it is,” Stotts said. “But injuries happen in this league, and someone usually has to step in and fill the void. That’s what the guys will do.”

Stotts said he would wait until Monday to decide who will start if either injured starter cannot go. He rattled off the names of Nolan Smith, Ronnie Price, Will Barton, Victor Claver, Sasha Pavlovic and Luke Babbitt as possibilities saying, “They’re all in the mix.”

Matthews injured the hip Saturday when he took a knee to it, and he sustained what the team termed a “contusion” and “flexor strain.” As he spoke to reporters after practice Sunday, Matthews held a small box with dials and digital numbers on it and four wires protruding that were attached to patches on his left hip.

“It’s just kind of pumping and circulating blood and all that kind of stuff,” Matthews said of the “H-Wave” device.

Matthews didn’t practice Sunday, instead taking treatment and doing some work on the stationary bike to increase his mobility, and he planned to jump into the pool for more work. Although he will probably be a game-time decision, he was pleased by the progress he had made.

“I couldn’t do this yesterday,” he said while moving his left leg. “I couldn’t lift my leg up, I couldn’t walk normal. So for me to be able to do that, get out of bed, put my pants on without grimacing, I’m encouraged by that.”

Batum’s outlook seemed less hopeful as his back continued to bother him. Batum originally injured the back at Indiana on Wednesday and was questionable right up until game-time Saturday. He started the game, but twice had to leave because of pain. He said Sunday that the back was worse, making it unlikely he would play Monday.

“I doubt it -- I don’t think I’m going to go tomorrow,” Batum said. “The way I am right now is worse than yesterday. Last night when I was on the court, the team played bad because I couldn’t do anything. It’s not only for me, (but) for the team, because I didn’t help the team. I make it worse when I was on the court last night.”

Batum said he suffered through a rough night in which he struggled to sleep.

“It was tough, hard to find positions to feel good,” Batum said. “When I sit, I don’t feel good, so I have to stand or lay down. I can’t really sit down. I don’t feel good right now, so I have to take care of it, get some treatment.”

The Blazers have not fared well in the two games in which they were missing a starter. On Nov. 21, center J.J. Hickson sat the game at Phoenix with a left shoulder injury, and the Blazers lost 114-87. On Nov. 25, forward LaMarcus Aldridge sat out the game at Brooklyn with back spasms, and the Blazers lost 98-85.

Batum and Matthews each average 16 points per game. How can the Blazers make up for missing 32 points, with a bench that averages an NBA-worst 14.9 points?

“We’re going to score points. Who they come from, I couldn’t tell you right now,” Stotts said. “Obviously, Damian (Lillard) and LaMarcus will have theirs. But we’ll score points, and it won’t come from one guy. It will come from a group of people. They’re NBA players. They gotta come out and make plays.”